Cooling, freezing and heating apparatus



y 7, 1935. T. LINDSETH 2,000,467

COOLING, FREEZING, AND HEATING APPARATUS Filed Sept. 9, 1931 IN V ENTOR. 77/500065 50 055771 BY @Qavwww A TTORNEY lin Patented May 7, 1935 Sptember]; 1031. he. at)

e ch- 01014514 My invention relates tocooling,

tion are: 3 I

First. to provide an apparatus of this class a heating'medium' I Second,to provide 'an'appa'ratus oi this class adapted for small installs; lconduit 3, there is provided a blower 4, so as to maintain a flow of airtherethrugh.- The other end of the air'conduit coil 2 is connected to anwhich is particiflarly M0118; 0

Third, to provide anapparatusof'this class which enables a room orroomstnere-- with'to be maintained at'a given temperature anywhere froma-point considerab 1? ing toa moderately hottemperature;

. l'burth. to'provide anapparatus of this classwhich maintainsacirculation of air in the room with which itis'connected so as tomaintains uniform throughout the room: and

Fifth. to provide on the whole a noveily constructed ireez'ing'andheating apparatus" which is extremely simple or construction pro-'portionalto its functions, disable, eiiicient in its actionkamlj whichwill readily deteriorate or get out of order.

with theseand otherobiefcts in view as" will appear hereinafter; myinvention consists of cer-'- tainnovel featuresof construction,combinationand enter parts and portions as will be hereinafter"described in detail and par i larly set forth in the appended-clams;reference I V is an electrically operated uimmersion heater *thecharacters of reference thereon, which form a part of this application.in which:

Figure l is a diagrammatical sectional view of the apparatus with partsand portions as shown in elevation; Fig. 2 is a transverse sectionalview taken along section line 2-4 of Fig. 1; Fig. 3 is anothertransverse sectional view taken alo section line H of Fig. i; Fig. 4 isan enlarged transverse sectional view of the heating means taken through4-4 of Fig. 3; and Fig. 5 is a diagrammatical view showing thethermostat and its relation to the reirigeration and heating units.

Similar characters of reference refer to simi lar parts and portionsthroughout the several views of the drawing.

Brine tank I, air conduit will, air intake conduit I, blower 4, airoutlet conduit 5, freezing coils 0 and 1, expansion valve 8,refrigerating unit 8, heater l0, and thermostat ll, constitute theprincipal parts and portions of my cooling, freezing and heatingapparatus.

A brine tank I is located as near as feasible to the room or chamber Cin which the temperatingapparatmandtheobiectsofmyinwnheatinsulatingmaterial.

whichthe' air cooling is ture is to be controlled. The tank is filledwith brine and the walls and top arerprovided with Coiled within thebrine tank. I is an air condui'tl of relatively lame cross section. Theupper end of the coil 2 is connected to an intake conduit 3 whichleadsfrom the chamber C to the 6011. Somewhere between the air intakeoutlet-conduit I which leads from the coil to the {chamber 0' preferablenear the floor thereof.

Arrangedinthebrinetankareapairoitreez- I surrounds the other air conduitcoil, as shown in Figsgl andz. The freezing coils 6 and I are connectedtogether and form a single length of pipe, the ends of which protrudefrom the brine tankfthe intake plpebelng provided with a which may mmthe iorm of an open loop, the ends Ifla ofwhich protrude from the sideof the brine tank, as shown in Fig. 3.

The heater comprises a core or heating element iilb such as carbon orresistance wire, which is adapted to become heated when current passestherethrough, the core surrounded by suitable insulating material Illc,which is retained in place by suitable Jacket or casing ltd. Theinsulation prevents actual contact between the brine and the heatingelement lllb, thereby eliminating the possibility of a short circuit.

The ends I01: 01' the heater i0 protrude through the side wall of thetank and are connected to a suitable source of electricity. The ends maybe enclosed in a suitable box illd mounted on the outside of the brinetank.

If it is desired to cool the chamber, the refrigerating unit 8 isstarted, which enables the freezing coils 6 and I to reduce thetemperature of the brine in the tank I, at the same time the blowercirculates air through the air conduit 2, thereupon the brine cools theair therein. By regulating the expansion valve 8 of the refrigeratingunit 9, the action of the freezing coils may be controlled, so that thetemperature of the brine is regulated, and the temperature of the sameis brought to the desired point.

Should it be desired to warm the chamber, the refrigerating unit isturned oil and the circuit through the heater II is turned on, wherebythe brine is warmed so as to, in turn, warm the air within the airconduit coil, thus the temperature of the chamber may be held at anypoint throughout an extremely wide range.

The above may be accomplished automatically by means of a suitablethermostat controlled switch I I arranged to control the heating unit orthe refrigerating unit, thus permitting a continuous range oftemperature control beginning below and terminating above normaltemperature.

Although the liquid within the tank I is referred to as brine, anyliquid having a low freezing point and a high vaporization point may beused. Certain kinds of oils may be used as well as many solutions. Ifliquids which do not conduct electricity are used, the heating elementneed not be provided with insulation.

It is obvious from the construction as illustrated in the drawing anddescribed in the foregoing specification, that there is provided acooling, freezing and heating apparatus as aimed at and set forth in theobjects of the invention, and though I have shown and described aparticular construction, combination and arrangement of parts andportions, I do not wish to be limited to this particular construction,combination and arrangement, but desire to include in the scope of myinvention the construction, combination and arrangement substantially asset forth in the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

i. In a cooling, freezing and heating apparatus, an air circulatingsystem including a chamber, an air conduit connected therewith, and fanmeans for maintaining circulation of air through said conduit andchamber, a portion of said conduit arranged in a coil, a tank forreceiving said coil, 9. temperature transmitting medium contained insaid tank in direct contact with said coil and immersing the same,freezing coils positioned and arranged both inside and outside of thecoil in said conduit and immersed in said temperature transmittingmedium, a heating medium positioned in alignment with and below the coilin said conduit immersed in and in direct contact with the temperaturetransmitting medium in said tank,.said freezing coils forming guidemeans for directing the temperature transmitting mediums as heatedaround said conduit coil.

2. In a cooling, freezing and heating apparatus, an air circulatingsystem including a chamber, an air conduit connected therewith, andmeans for maintaining circulation of air through said conduit andchamber, a portion of said conduit arranged in a coil, a tank forreceiving said coil, a temperature transmitting medium contained in saidtank in direct contact with and immersing said coil, freezing coilspositioned and arranged both inside and outside of the coil in saidconduit and in said temperature transmitting medium, a heating mediumpositioned in alinement with and below the coil in said conduit immersedin and in direct contact with the temperature transmitting medium insaid tank, said freezing coils forming guide means for di recting thetemperature transmitting mediums as heated around said conduit coil, andan automatic control means common to both said cooling means and saidheating means.

3. In a cooling, freezing and heating apparatus, an air circulatingsystem including a chamberinwhichtheairistobecooledorheated. an airconduit connected at its opposite ends to the upper and lower sides ofsaid chamber, a coil intermediate its ends, a suction fan intermediatesaid coil and the upper end of said conduit, a tank in which said coilis mounted, brine in said tank in direct contact with said coil andimmersing the same, freezing coils positioned inside of said coil insaid conduit, other freezing coils positioned and arranged outside ofthe coil in said conduit and all immersed in said brine, an electricimmersion heater positioned in alinement with and directly below saidcoilinsaidconduitandimmersedinsaidbrine in said tank, said-freezingcoils forming guide means for directing the heat from said electricalcirgmersion heater as heated around said conduit 'I'HEODOREIW 0

